CN108832685B - Charging device for wind power pitch system and detection method thereof - Google Patents
Charging device for wind power pitch system and detection method thereof Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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Abstract
The invention provides a detection method of a charging device for a wind power pitch system, wherein the charging device for the wind power pitch system is used for charging a battery, and the detection method comprises the following steps: a. detecting whether the battery is correctly connected to a charging device before charging; b. detecting a charging current and a battery voltage according to a preset first time period; c. judging whether the charging current is within a preset standard current range or not; d. judging whether the battery voltage is within a preset standard voltage range or not; e. and when the charging current and the battery voltage exceed the preset range at the same time, disconnecting the electrical connection between the battery and the charging device and giving an alarm. The detection method of the charging device for the wind power pitch system has the function of preventing reverse connection, reduces accident potential caused by reverse connection of the battery due to manual misoperation, and improves safety of users and equipment.
Description
Technical Field
The invention relates to a charging device for a wind power pitch system and a detection method thereof.
Background
With the development of human society and technology, the demand for energy is getting bigger and bigger, and wind power generation as a renewable clean energy which is mature in the current technology is one of important means for realizing sustainable development all the time, and is widely valued by various countries. The variable pitch control system is an important component in a wind power generation system, and has the main function of controlling the pitch angle of the blades to be automatically adjusted along with the wind speed, so that the output power of the generator is kept stable.
In order to ensure safe, stable and reliable operation of the wind power generation system, a rechargeable energy storage device, such as a rechargeable battery, is usually disposed in the wind power generation system and used as a backup power source of the pitch control system. When the fan has a serious fault, the backup power supply can output direct current to drive the direct current motor to quickly withdraw the paddle, so that the safety of the fan is ensured.
Rechargeable batteries are typically recharged using a charging device to replenish them in a timely manner during a power outage. The charging device is used as a key component for charging the backup power supply by the variable pitch control system, and the perfection of the function of the charging device is beneficial to improving the running safety and the power generation efficiency of the fan. The existing charging device and the battery are not provided with an anti-reverse connection function, and the charging device is not provided with a detection function of a connection error. And installation and follow-up maintenance processes of the fan are manual operations, and once the charging device and the battery are connected in a reverse mode or in a wrong mode through misoperation, the charging device is possibly damaged, even the battery can be burnt, fire is caused, great harm is caused to personnel and fan safety, and improvement is urgently needed.
Disclosure of Invention
The invention aims to provide a charging device for a wind power pitch system and a detection method thereof.
In order to achieve one of the above objects, the present invention provides a method for detecting a charging device for a wind power pitch system, where the charging device for the wind power pitch system is used to charge a battery, and the method includes the following steps: a. detecting whether the battery is correctly connected to a charging device before charging; b. detecting a charging current and a battery voltage according to a preset first time period; c. judging whether the charging current is within a preset standard current range or not; d. judging whether the battery voltage is within a preset standard voltage range or not; e. and when the charging current and the battery voltage exceed the preset range at the same time, disconnecting the electrical connection between the battery and the charging device and giving an alarm.
As a further improvement of the present invention, the step a includes detecting a voltage of the battery, comparing the detected voltage of the battery with a preset standard value, and disconnecting the battery from the charging device and giving an alarm when the detected voltage value does not meet the preset standard value.
As a further improvement of the present invention, when both the charging current and the battery voltage exceed a predetermined range, the charging current and the battery voltage are re-detected for a predetermined second time period.
As a further development of the invention, the second time period is smaller than the first time period.
As a further development of the invention, the first time period is 1 second and the second time period is 1 millisecond.
In order to achieve one of the above objects, the present invention provides a charging device for a wind power pitch system, for charging a battery, including: a power conversion circuit that converts alternating current into direct current for charging a battery; a voltage detection circuit for detecting a voltage in the charging circuit; the current detection circuit is used for detecting the current in the charging loop; the microprocessor controls the charging loop to work in a preset mode; the charging circuit further comprises an alarm device and a switch circuit, the microprocessor compares the current with a preset standard current range, the microprocessor compares the voltage with a preset standard voltage range, and when the charging current and the battery voltage exceed the preset range at the same time, the microprocessor controls the switch circuit to disconnect the electric connection between the battery and the charging device and controls the alarm device to send out warning information.
As a further improvement of the present invention, the microprocessor detects the voltage of the battery through the voltage detection circuit before the start of charging, and when the detected voltage value does not conform to a preset standard value, the microprocessor controls the switch circuit to disconnect the electrical connection between the battery and the charging device, and controls the alarm device to send out warning information.
As a further improvement of the present invention, when the charging current and the battery voltage simultaneously exceed a predetermined range, the microprocessor re-detects the charging current and the battery voltage according to a predetermined second time period.
As a further development of the invention, the second time period is smaller than the first time period.
As a further improvement of the invention, the alarm device comprises an LED light source, and the LED light source emits light signals to warn.
Compared with the prior art, the charging device for the wind power pitch system and the detection method thereof provided by the invention have the function of reverse connection prevention detection. The charging device firstly detects the connection state of the battery before executing charging work, and continuously detects the connection state of the battery during the charging work, and once detecting the reverse connection fault, the charging device immediately stops charging output and sends an alarm to inform related personnel to process. The accident potential caused by reverse connection of the battery through manual misoperation is reduced, the safety of a user and equipment is greatly improved, and the fan is guaranteed to operate safely, reliably and stably.
Drawings
Fig. 1 is a schematic diagram of a charging device for a wind power pitch system according to an embodiment of the invention;
fig. 2 is a circuit diagram of a voltage detection circuit of a charging device for a wind power pitch system according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a current detection circuit of a charging device for a wind power pitch system according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a switching device control circuit of a charging device for a wind power pitch system according to an embodiment of the present invention;
fig. 5 is a flowchart of a detection method of a charging device for a wind turbine pitch system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. The present invention is not limited to the embodiment, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the embodiment are included in the scope of the present invention.
Fig. 1 is a schematic view of a charging device for a wind turbine pitch system according to the present invention. The charging loop is used for charging the battery when the battery is in a power shortage state. The battery is typically a rechargeable battery 1, such as a lead-acid battery, a nickel-metal hydride battery, a lithium ion battery, or the like.
The charging device for the wind power pitch system comprises a charging current detection circuit 2, a battery voltage detection circuit 3, a switching device 4, a power conversion circuit 5, a microprocessor 6 and an alarm device 7. The power conversion circuit 5 can convert the alternating current into direct current for charging the battery 1; the battery voltage detection circuit 3 is used for detecting voltage change in the charging loop; the charging current detection circuit 2 is used for detecting the current in the charging loop; the switching device 4 is used for controlling and regulating the power transmitted to the battery 1 by the power conversion circuit 5; the microprocessor 6 controls the progress of charging through the switching device 4 or sends out warning information through the warning device 7 based on various detected parameters in the charging circuit.
Please refer to fig. 2, which is a circuit diagram of a voltage detection circuit of the charging device for the wind turbine pitch system according to the present invention. The voltage detection circuit is composed of resistors R31, R24, R134 and R128 and a differential operational amplifier U12-B. Preferably, the differential operational amplifier employs LM2904 MX. One end of the resistor R31 is connected with the negative electrode BAT-of the charging circuit, and the other end is connected with the inverting input end of the differential operational amplifier U12-B. One end of the resistor R24 is connected with the anode BAT + of the charging circuit, and the other end is connected with the positive input end of the differential operational amplifier U12-B. One end of the resistor R128 is connected with the inverting input end of the differential operational amplifier U12-B, and the other end is connected with the output end of the differential operational amplifier U12-B. One end of the resistor R134 is connected with the positive input end of the differential operational amplifier U12-B, and the other end is connected with the bias voltage with the voltage of 1.65V. The output of the differential operational amplifier U12-B is connected to the AD sampling port V-BAT of the microprocessor. The resistance of the resistor R24 is the same as the resistance of the resistor R31, and the resistance of the resistor R128 is the same as the resistance of the resistor R134. The relationship between the voltage V _ BAT output to the AD sampling port of the microprocessor and the actual voltage VBAT of the battery is as follows: v _ BAT =1.65+ VBAT R134/R24.
Fig. 3 is a circuit diagram of a current detection circuit of the charging device for the wind turbine pitch system according to the present invention. The current detection circuit is composed of resistors R1, R50, R51, R95 and R137 and a differential operational amplifier U16-C. Preferably, the differential operational amplifier employs LM2902 DR2G of TI. The resistor R95 is a current detection resistor, the charging current I flows through the resistor R95, one end of the resistor R95 is grounded, the other end of the resistor R1 is connected, and the other end of the resistor R1 is connected with the positive input end of the differential operational amplifier U16-C. One end of the resistor R137 is connected with a bias voltage of 1.65V, and the other end of the resistor R is connected to the positive input end of the differential operational amplifier U16-C. One end of the resistor R50 is grounded, and the other end is connected with the inverting input end of the differential operational amplifier U16-C. One end of the resistor R51 is connected with the inverting input end of the differential operational amplifier U16-C, and the other end is connected with the output end of the differential operational amplifier U16-C. The output of the differential operational amplifier U16-C is connected to the AD sampling port of the microprocessor. The resistance of the resistor R1 is the same as that of the resistor R50, and the resistance of the resistor R137 is the same as that of the resistor R51. The relationship between V _ CURRENT and charging CURRENT I output to the sampling port of the microprocessor AD is: v _ CURRENT = R95 × I (R51/R50).
Fig. 4 is a circuit diagram of a switching device control circuit of the charging device for the wind turbine pitch system according to the present invention. The switching device control circuit comprises a resistor R56, a transistor Q7, a diode D5 and a switching device K5. Preferably, the switching device K5 is a relay. One end of the resistor R56 is connected with the base electrode of the triode Q7, and the other end of the resistor R56 is connected with the ground wire; the base electrode of the triode Q7 is connected with a CTL port of the microprocessor, the collector electrode of the triode Q7 is connected with the anode of the diode D5, and the emitter electrode of the triode Q7 is connected with the ground wire; the cathode of the diode D5 is connected with the power supply voltage of + 12V; the anode of the switching device K5 is connected to the +12V power supply voltage, and the cathode is connected to the anode of the diode D5; the positive electrode V + of the power conversion circuit 5 is connected to the positive electrode of the battery 1 through the switching portion of the switching device K5, and the negative electrode of the battery 1 is connected to the negative electrode V-of the power conversion circuit 5.
Before the charging device for the wind power variable pitch system starts charging, starting detection is firstly carried out. The microprocessor 6 detects the voltage of the battery 1 through a voltage detection circuit, and compares the detected battery voltage with a preset standard value to judge whether the detected battery voltage is normal. If the detected voltage value does not accord with the preset standard value, for example, the polarity does not accord with the preset standard value, the battery 1 is judged to be incorrectly connected at the moment, the microprocessor 6 sends an electric signal to control the switching device to switch off the control circuit, the charging device for the wind power pitch system does not charge the battery 1, and an alarm is sent out through the alarm device.
When the charging device for the wind power pitch system is in charging operation, the microprocessor 6 detects current and voltage at regular intervals through the charging current detection circuit 2 and the battery voltage detection circuit 3. During charging the battery 1, a charging current exists in the charging loop, and the magnitude of the charging current is larger than a preset minimum value. If the charging current is less than the predetermined minimum value, the battery 1 may be fully charged, or there may be an abnormal situation in the charging circuit, such as a switch trip, a fuse blow, a connector contact failure, or a battery being erroneously accessed by an operator.
At this time, the microprocessor 6 will determine the voltage condition detected by the battery voltage detection circuit 3, and thus the detected voltage is within the preset standard voltage range, which indicates that the battery 1 is still correctly connected in the charging circuit, so as to determine that the charging circuit is normal. If the voltage output by the charging device is detected to exceed the preset standard voltage range, the situation indicates that the battery 1 is not correctly connected in the charging loop, and a reverse connection situation may occur.
In the present embodiment, the microprocessor 6 sets different periods of detection of reverse connection prevention of the battery 1. Under normal conditions, the period of the microprocessor 6 for detecting the current and the voltage is 1 second; the period for which the microprocessor 6 detects the current and voltage is adjusted to 1 millisecond, for example, after it has detected the presence of an abnormality of the reverse connection of the battery 1. The working efficiency of the charging device for the wind power pitch control system is improved. Of course, it will be understood by those skilled in the art that the period for detecting the current and the voltage can be extended or shortened as appropriate according to the actual application.
When the charging loop is abnormal, the microprocessor 6 sends an electric signal to control the switching device to control the circuit to be disconnected, and the charging process of the battery 1 is stopped. At the same time, the microprocessor 6 controls the alarm device 7 to give an alarm. The alarm device comprises a relay and a warning device. The relay is used for controlling the work of the warning device, so that the warning device can generate the effect different from the normal state to warn. In the embodiment, the alarm device adopts a normally closed relay and an LED lamp, and when the charging loop normally operates, the LED lamp emits normal light; when the charging loop is abnormal, the microprocessor controls the relay to be switched off, and the LED lamp is turned off or is in a color different from the normal state to warn. Of course, it will be appreciated by those skilled in the art that other types of combinations of the alarm device may be selected, for example, the relay may be a normally open relay, and the relay may be closed only when an abnormality occurs in the charging circuit. The warning device can be a loudspeaker, and when the charging loop normally operates, the loudspeaker does not make a sound; when the charging loop is abnormal, the loudspeaker gives out a sound to warn.
Referring to fig. 5, the detection method provided by the present invention includes the following steps:
step S0: and starting the system. The charging circuit is energized through the input terminal.
Step S1: the charging loop voltage is detected. After the charging circuit is started, the microprocessor starts to work first. The microprocessor detects the voltage of the battery through the voltage detection circuit.
Step S2: and judging whether the detected voltage is abnormal or not. The microprocessor compares the detected battery voltage with a preset standard value. If the battery is correctly connected in the charging loop, the voltage of the battery can be detected in the charging loop. The microprocessor compares the detected voltage condition with a preset standard value to judge whether the detected voltage value is normal or not. If the detected voltage value is not in accordance with the preset standard value, for example, no battery voltage exists, or the detected voltage value is smaller than the preset voltage value, or the polarities are different, it is judged that the battery is not correctly connected to the charging device at the moment, the microprocessor 6 sends out an electric signal to control the switching device to switch off the control circuit, the charging device for the wind power pitch system does not charge the battery 1, and an alarm is sent out through the alarm device.
Step S3: charging is started. In step S2, the microprocessor determines that there is no abnormality in the detected loop voltage, and outputs an enable signal to operate the power conversion circuit, and outputs a normal charging voltage and current to charge the connected battery.
Step S4: and detecting the charging current and the battery point in the charging loop according to a preset period. When the battery is normally charged, the charging current is detected by the current detection circuit at regular intervals. Preferably, the microprocessor 6 detects the current for a period of 1 second.
Step S5: and judging whether the charging current and the battery voltage are abnormal or not. During charging the battery 1, a charging current exists in the charging loop, and the magnitude of the charging current is larger than a preset minimum value. If the charging current is less than the predetermined minimum value, the battery 1 may be fully charged, or there may be an abnormal situation in the charging circuit, such as a switch trip, a fuse blow, a connector contact failure, or a battery being erroneously accessed by an operator. At this time, the microprocessor 6 will determine the voltage condition detected by the battery voltage detection circuit 3, and thus the detected voltage is within the preset standard voltage range, which indicates that the battery 1 is still correctly connected in the charging circuit, so as to determine that the charging circuit is normal. If the voltage output by the charging device is detected to exceed the preset standard voltage range, the situation indicates that the battery 1 is not correctly connected in the charging loop, and a reverse connection situation may occur.
Step S6: the switching device is controlled to be turned off and an alarm is issued. When step S5 judges that both the current and the voltage exceed the preset standard ranges, the microprocessor 6 sends an electric signal to control the switching device to control the circuit to be disconnected, and stops the charging process to the battery 1. Meanwhile, the microprocessor 6 controls the alarm device 7 to give an alarm, and the alarm is sent to inform a worker of maintenance.
In summary, the charging device for the wind power pitch system and the detection method thereof provided by the invention have the function of reverse connection prevention detection. The charging device firstly detects the connection state of the battery before executing charging work, and continuously detects the connection state of the battery during the charging work, and once detecting the reverse connection fault, the charging device immediately stops charging output and sends an alarm to inform related personnel to process. The accident potential caused by reverse connection of the battery through manual misoperation is reduced, the safety of a user and equipment is greatly improved, and the fan is guaranteed to operate safely, reliably and stably.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A detection method of a charging device for a wind power pitch system is provided, and the charging device for the wind power pitch system is used for charging a battery, and is characterized by comprising the following steps:
a. detecting whether the battery is correctly connected to a charging device before charging;
b. detecting a charging current and a battery voltage according to a preset first time period; the voltage detection circuit consists of resistors R31, R24, R134 and R128 and a differential operational amplifier U12-B, wherein one end of the resistor R31 is connected with a negative electrode BAT-of the charging circuit, and the other end of the resistor R31 is connected with an inverting input end of the differential operational amplifier U12-B; one end of the resistor R24 is connected with the anode BAT + of the charging circuit, and the other end is connected with the positive phase input end of the differential operational amplifier U12-B; one end of the resistor R128 is connected with the inverting input end of the differential operational amplifier U12-B, and the other end of the resistor R128 is connected with the output end of the differential operational amplifier U12-B; one end of the resistor R134 is connected with the non-inverting input end of the differential operational amplifier U12-B, and the other end of the resistor R is connected with the bias voltage with the voltage of 1.65V; the output end of the differential operational amplifier U12-B is connected to an AD sampling port V-BAT of the microprocessor; the resistance value of the resistor R24 is the same as that of the resistor R31, and the resistance value of the resistor R128 is the same as that of the resistor R134; the relationship between the voltage V _ BAT output to the AD sampling port of the microprocessor and the actual voltage VBAT of the battery is as follows: v _ BAT =1.65+ VBAT R134/R24; the current detection circuit consists of resistors R1, R50, R51, R95, R137 and a differential operational amplifier U16-C; the resistor R95 is a current detection resistor, the charging current I flows through the resistor R95, one end of the resistor R95 is grounded, the other end of the resistor R1 is connected with the other end of the resistor R1, and the other end of the resistor R1 is connected with the non-inverting input end of the differential operational amplifier U16-C; one end of the resistor R137 is connected with a bias voltage of 1.65V, and the other end of the resistor R is connected to the non-inverting input end of the differential operational amplifier U16-C; one end of the resistor R50 is grounded, and the other end is connected with the inverting input end of the differential operational amplifier U16-C; one end of the resistor R51 is connected with the inverting input end of the differential operational amplifier U16-C, and the other end is connected with the output end of the differential operational amplifier U16-C; the output end of the differential operational amplifier U16-C is connected to the AD sampling port of the microprocessor; the resistance value of the resistor R1 is the same as that of the resistor R50, and the resistance value of the resistor R137 is the same as that of the resistor R51; the relationship between V _ CURRENT and charging CURRENT I output to the sampling port of the microprocessor AD is: v _ CURRENT = R95 × I (R51/R50);
c. judging whether the charging current is within a preset standard current range or not;
d. judging whether the battery voltage is within a preset standard voltage range or not;
e. when the charging current and the battery voltage exceed the preset range at the same time, judging that the battery is reversely connected, disconnecting the electrical connection between the battery and the charging device and giving an alarm;
the step of determining that the battery is reversely connected is specifically that when the charging current is smaller than a preset minimum value, the battery is judged to be fully charged or an abnormal condition exists in a charging loop; the microprocessor further judges through the detected voltage, and if the detected voltage is within the preset standard voltage range, the battery is still correctly connected in the charging loop, and the charging loop is judged to be normal; and if the voltage output by the charging device is detected to exceed the preset standard voltage range, judging that the battery is reversely connected.
2. The detection method of the charging device for the wind power pitch system according to claim 1, characterized in that: the step a comprises detecting the voltage of the battery, comparing the detected voltage of the battery with a preset standard value, and disconnecting the electrical connection between the battery and the charging device and giving an alarm when the detected voltage value does not accord with the preset standard value.
3. The method for detecting the charging device for the wind power pitch system according to claim 1, further comprising: and when the charging current and the battery voltage simultaneously exceed the preset range, the charging current and the battery voltage are detected again according to a preset second time period.
4. The detection method of the charging device for the wind power pitch system according to claim 3, characterized in that: the second time period is less than the first time period.
5. The detection method of the charging device for the wind power pitch system according to claim 4, characterized in that: the first time period is 1 second and the second time period is 1 millisecond.
6. The utility model provides a wind-powered electricity generation becomes charging device for oar system for charge for the battery, its characterized in that includes:
a power conversion circuit that converts alternating current into direct current for charging a battery;
the voltage detection circuit is used for detecting the voltage in the charging loop according to a preset first time period; the voltage detection circuit consists of resistors R31, R24, R134, R128 and a differential operational amplifier U12-B, wherein one end of the resistor R31 is connected with a negative electrode BAT-of the charging circuit, and the other end of the resistor R31 is connected with an inverting input end of the differential operational amplifier U12-B; one end of the resistor R24 is connected with the anode BAT + of the charging circuit, and the other end is connected with the non-inverting input end of the differential operational amplifier U12-B; one end of the resistor R128 is connected with the inverting input end of the differential operational amplifier U12-B, and the other end of the resistor R128 is connected with the output end of the differential operational amplifier U12-B; one end of the resistor R134 is connected with the non-inverting input end of the differential operational amplifier U12-B, and the other end of the resistor R is connected with the bias voltage with the voltage of 1.65V; the output end of the differential operational amplifier U12-B is connected to an AD sampling port V-BAT of the microprocessor; the resistance value of the resistor R24 is the same as that of the resistor R31, and the resistance value of the resistor R128 is the same as that of the resistor R134; the relationship between the voltage V _ BAT output to the AD sampling port of the microprocessor and the actual voltage VBAT of the battery is as follows: v _ BAT =1.65+ VBAT R134/R24;
the current detection circuit is used for detecting the current in the charging loop according to a preset first time period; the current detection circuit consists of resistors R1, R50, R51, R95, R137 and a differential operational amplifier U16-C; the resistor R95 is a current detection resistor, the charging current I flows through the resistor R95, one end of the resistor R95 is grounded, the other end of the resistor R1 is connected, and the other end of the resistor R1 is connected with the non-inverting input end of the differential operational amplifier U16-C; one end of the resistor R137 is connected with a bias voltage of 1.65V, and the other end of the resistor R is connected to the non-inverting input end of the differential operational amplifier U16-C; one end of the resistor R50 is grounded, and the other end is connected with the inverting input end of the differential operational amplifier U16-C; one end of the resistor R51 is connected with the inverting input end of the differential operational amplifier U16-C, and the other end is connected with the output end of the differential operational amplifier U16-C; the output end of the differential operational amplifier U16-C is connected to the AD sampling port of the microprocessor; the resistance value of the resistor R1 is the same as that of the resistor R50, and the resistance value of the resistor R137 is the same as that of the resistor R51; the relationship between V _ CURRENT and charging CURRENT I output to the sampling port of the microprocessor AD is: v _ CURRENT = R95 × I (R51/R50);
the microprocessor controls the charging loop to work in a preset mode;
the charging loop further comprises an alarm device and a switch circuit, the microprocessor compares the current with a preset standard current range, the microprocessor compares the voltage with a preset standard voltage range, when the charging current and the battery voltage exceed the preset range at the same time, the battery is judged to be reversely connected, the microprocessor controls the switch circuit to disconnect the electrical connection between the battery and the charging device, and controls the alarm device to send out warning information; the step of determining that the battery is reversely connected is specifically that when the charging current is smaller than a preset minimum value, the battery is judged to be fully charged or an abnormal condition exists in a charging loop; the microprocessor further judges through the detected voltage, and if the detected voltage is within the preset standard voltage range, the battery is still correctly connected in the charging loop, and the charging loop is judged to be normal; and if the voltage output by the charging device is detected to exceed the preset standard voltage range, judging that the battery is reversely connected.
7. The charging device for the wind power pitch system according to claim 6, wherein: the microprocessor detects the voltage of the battery through the voltage detection circuit before charging starts, and when the detected voltage value is not consistent with a preset standard value, the microprocessor controls the switch circuit to disconnect the electrical connection between the battery and the charging device and controls the alarm device to send out warning information.
8. The charging device for the wind power pitch system according to claim 6, wherein: and when the charging current and the battery voltage simultaneously exceed the preset range, the microprocessor detects the charging current and the battery voltage again according to a preset second time period.
9. The charging device for the wind power pitch system according to claim 8, wherein: the second time period is less than the first time period.
10. The charging device for the wind power pitch system according to claim 6, wherein: the alarm device comprises an LED light source, and the LED light source sends out light signal warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690380.4A CN108832685B (en) | 2018-06-28 | 2018-06-28 | Charging device for wind power pitch system and detection method thereof |
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| CN201810690380.4A CN108832685B (en) | 2018-06-28 | 2018-06-28 | Charging device for wind power pitch system and detection method thereof |
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| CN111463861A (en) * | 2020-04-10 | 2020-07-28 | 东莞龙升电子有限公司 | Method and device for controlling charger switch, computer equipment and storage medium |
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| US5923150A (en) * | 1996-03-29 | 1999-07-13 | Sony Corporation | Charging apparatus |
| US6114839A (en) * | 1997-11-20 | 2000-09-05 | Hitachi Koki Co., Ltd. | Battery charging apparatus with error detection |
| US20020070708A1 (en) * | 2000-12-08 | 2002-06-13 | Ten-Der Wu | Battery charging device |
| JP2009177930A (en) * | 2008-01-23 | 2009-08-06 | Nec Saitama Ltd | Charging circuit |
| JP6088289B2 (en) * | 2013-02-28 | 2017-03-01 | エスアイアイ・セミコンダクタ株式会社 | Charge / discharge control circuit and battery device |
| CN103219776A (en) * | 2013-05-02 | 2013-07-24 | 安伏（苏州）汽车电源科技有限公司 | High-power battery charging device capable of preventing battery reversal |
| CN103794831B (en) * | 2014-02-19 | 2016-07-20 | 中达电通股份有限公司 | A kind of method for charging batteries and system |
| CN104836304A (en) * | 2015-05-26 | 2015-08-12 | 深圳市金誉半导体有限公司 | Charging chip of lithium ion battery |
| CN105406548B (en) * | 2015-12-23 | 2018-03-09 | 浙江亚能能源科技有限公司 | The whether online detection method of battery in electri forklift charger charging process |
| CN205693354U (en) * | 2016-06-12 | 2016-11-16 | 大连罗宾森电源设备有限公司 | A kind of DC charging motor output reverse connection prevention protection circuit |
| CN107662509A (en) * | 2016-07-28 | 2018-02-06 | 青岛华烁高科新能源技术有限公司 | A kind of vertical AC charging pile and method |
| CN106787065A (en) * | 2016-12-21 | 2017-05-31 | 苏州格远电气有限公司 | Wind power pitch-controlled system back-up source charging device and its charge control method |
| CN106655436A (en) * | 2016-12-21 | 2017-05-10 | 苏州格远电气有限公司 | Charging apparatus and charging control method for backup power supply of wind power variable pitch system |
| CN206379765U (en) * | 2016-12-21 | 2017-08-04 | 苏州格远电气有限公司 | The charging device of wind power pitch-controlled system back-up source |
| CN206542236U (en) * | 2017-03-14 | 2017-10-03 | 纽福克斯光电科技（上海）有限公司 | Charging circuit and system |
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